A student has two solid blocks that have different masses. The student knows that each block is composed of a pure substance, but she wants to know if the blocks are composed of the same pure substance. Which of these would best show that the blocks are composed of different substances?

A.
Both blocks sink when placed in water.
B.
Both blocks can be scratched by a piece of glass.
C.
One block conducts electricity and the other does not.
D.
One block has a greater volume than the other block.

Answers

Answer 1

Answer: I think the answer would be (D) because mass and volume are kinda different and If one has a different volume then it would have a different mass right?

Answer 2
C is the correct answer.

Explanation:
A and b don’t show anything that is different between the rocks so they are both cancelled. With D, if a block has a greater volume that has nothing to do with the substances. This shows that C is the best answer because if one block conducts electricity, that means it is composed of something different (for example metal).

Related Questions

What kind of reservoir shaped a lot of the Grand Canyon? How do you know?

i can't find science so this will be kind of out of place. this is 6th grade work

25 points!!!!

Answers

Great reading kid hope u pass
I dont know you tell me

If DNA sequence were to change in super hero's, what would this be called?

*Just for an assignment*

Answers

it would be called a mutation

A hammer can be used to see how a mineral breaks. If you observe square chunks of the mineral when broken, what can you conclude?

The mineral is soft.
The mineral is hard.
The mineral has cleavage.
The mineral does not have cleavage.

Answers

Answer:

The mineral has cleavage

Explanation:

Cleavage describes the shape of internal planes of weakness between the molecules that make up a mineral, often forming 3-D geometric shapes like cubes and prisms. When a mineral breaks, it will commonly break along these cleavage planes regardless of how hard or soft the mineral is.

Answer: It’s C. I think

Explanation: I hope this helps! And happy new yrs!

Multiple sclerosis is a disease in which the myelin sheaths of neurons in the central nervous system break down. What symptoms might this cause? Why?

Answers

Answer:

MS and other demyelinating diseases most commonly result in vision loss, muscle weakness, muscle stiffness and spasms, loss of coordination, change in sensation, pain, and changes in bladder and bowel function.

Explanation:

thats is correct

Answer:

it causes vision to become worse it lowers imune system it  causes bad  balence and other prolmes

Explanation:

i have ms

What type of plate boundary is in the image below?

Divergent

Convergent

Tranform

Answers

Answer:

A. divergent

Explanation:

The molten lava is melting the dirt, making it go through it. The lava will eventually go through the ground and go into a convergent.

Hope this helped.

Answer: Divergent


Explanation:

How do genetically modified foods affect society and the environment?

Answers

Answer:

Genetic modification produces genetically modified animals, plants and organisms. This could result from differences in nutritional content, allergic response, or undesired side effects such as toxicity, organ damage, or gene transfer.

Explanation:

existing species can be overrun by more dominant new species.

One important environmental impact of genetically modified (GM) foods is the threat to biodiversity resulting from the genetic transfer from GM crops to native plant species.

Why is the example of DDT included in the unit?
O to show that solutions have unintended consequences
to illustrate why pesticides should not be used by farmers
to promote organic farming methods
O to explain the chemical elements of common pesticides

Answers

To show that solutions have unintended consequences. DDT was used to kill mosquitos to prevent the spread of disease, and it unintentionally caused bald eagle eggs to become fragile and led to endangered status.

Compare an elephant’s trunk with a person’s hand. How are they similar? How are they different?

Answers

Answer:

one way that they are different is that unlike us humans they don't have fingers on their trunk. one way that they are similar is that both use something to pick objects up.

Explanation:

hope this helps you!

Both the elephant trunk and human hands are used to grasp objects.

The Elephant's trunk is the part of the elephant that extends outwards from its face and enables the elephant to pick up things. It is quite similar to the human hands in the sense that it can be used to grasp objects.

However, human hands are made of fingers but the trunk of an elephant is just a long structure that has no fingers. Hence, it is different from the human hands.

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Observe the two scenarios involving electrically charged objects. Predict what will happen when you bring the objects close together.

Two scenarios with electrically-charged objects. In the first scenario, a negatively charged balloon is brought close to a positively charged soda can. In the second scenario, a negatively charged balloon is brought close to a negatively charged balloon.

The balloon will attract the soda can, while the two balloons will repel each other.
The balloon will attract the soda can, while the two balloons will do nothing.
The balloon will repel the soda can, while the two balloons will also repel each other.
The balloon and soda can will do nothing, while the two balloons will repel each other.

Answers

Answer:

the balloon and soda can will do nothing, while the two balloons will repel each other

Explanation:

opposites attract and the soda can is too heavy to be attracted to the balloon

Like the person above me said in the comments, it might be (A).

Explain how resting potential is maintained and how an action potential occurs.

Answers

Answer:

resting potential is maintained by ion leaks and ion pumps

action potential occurs by:

- depolarization

-repolarization

-hyperpolarization

Explanation:

Sodium-potassium pumps move two potassium ions inside the cell as three sodium ions are pumped out to maintain the negatively-charged membrane inside the cell; this helps maintain the resting potential.

PHYSIOLOGY:
What can happen if the endocrine system malfunctions?

Answers

Explanation:

Your endocrine system releases the hormones in your body that controls your cells. The endocrine system is responsible for your growth. As a result of having it malfunction, your cells would no longer know when to do important things (such as deliver messages to parts of your body).

The endocrine system controls body temp

describe how the greenhouse effect interacts with the hydrosphere, atmosphere, and cryosphere

Answers

:

            loook over ur notes promise youll find thrm

Hydrosphere

Human contributions to greenhouse gases in the atmosphere are warming the earth's surface - a process which is projected to increase evaporation of surface water and accelerate the hydrologic cycle. In turn, a warmer atmosphere can hold more water vapor.

Atmosphere

This process makes Earth much warmer than it would be without an atmosphere. The greenhouse effect is one of the things that makes Earth a comfortable place to live.

Cryosphere

By reflecting sunlight, ice and snow have a cooling effect on the climate. Removing the ice to leave darker land or ocean reduces this cooling and so amplifies climate change. Thawing permafrost releases significant amounts of greenhouse gases, causing further warming.

Mendel carried out a dihybrid cross to examine the inheritance of the characteristics for seed color and seed shape. The dominant allele for yellow seed color is Y, and the recessive allele for green color is y. The dominant allele for round seeds is R, and the recessive allele for a wrinkled shape is r. The two plants that were crossed were F1 dihybrids RrYy. Identify the ratios of traits that Mendel observed in the F2 generation. Create a Punnett square to help you answer the question.

Answers

Simply create a dihybrid cross, and then create ratios from the outcomes. Remember that ratios only come from the bottom part of any fractions *If you need more help on dihybrid crosses I can send an example image

Dihybrid cross is a experiment including mating between two organisms, that are identically hybrid for two traits. The ratios of traits in F2 generation will be 9:3:3:1.

What is Punnett square?

Punnett square is the square diagram used to identify the genotype of the cross in experiment.  

Genotype is the collection of genes and phenotype is the physical appearance of the individual. The Punnette square for the given case will be creates as given in the image attached.

Thus, the ratio of traits will be 9:3:3:1 in the F2 generation.

For more details about dihybrid cross, visit:

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These type of cells are specialized, complex, more modern and multi-cellular and most plants and animals fit into this domain.


options:


Prokaryotic Cells



Eukaryotic Cells



Neither A nor B



Both A and B

Answers

Answer:

Eukaryotic cells

Explanation:

Eukaryotic cells are cells in which nucleus and other cellular organelles are bounded by doubled membrane.

B. Eukaryotic Cells

Explanation:

all organisms with cells that have nucleus and membrane-bound organelles (all eukaryotes)

Superhero DNA
1. What determines a person’s super hero ability?

2. If the DNA sequence were to change, what would this be called?

3. What are proteins and what do they code for?

Answers

3. Proteins are key working molecules building blocks in cells and they code for amino acid
1. An accidental mutation that changes DNA results in a super hero ability.
2. Mutation
3. Proteins are the key working molecules and building blocks in all cells and they code for amino acids.

Which statement is true of chloroplasts?

A. They transport glucose into the cell.
B.They convert light energy into chemical energy.
C. They convert the energy in glucose into a more usable form.
D. They are present in animal cells, but not in plant cells.

Answers

Answer:

B

Explanation:

Answer:

They convert light energy into chemical energy.

Explanation:

I had this on a test a few weeks ago and got it correct with this answer

What condition is required for piles of sediment to become a sedimentary rock?

1. Low force
2. High energy
3. High pressure
or 4. Low temperature

Answers

It is high pressure because sedimentary forms in layers of rocks are are very hardly compressed into a solid form.

Sedimentary rocks are created by the accumulation of already existing rocks or fragments of extinct organisms on the Earth's surface, hence option 3 is correct.  

What is a sedimentary rock?

Weathering causes rock fragments to become loose, which are subsequently moved to a basin or depression where sediment is trapped.

Sedimentary rock is created when sediment is firmly buried and gets compressed and cemented. Large boulders to tiny clay particles have been found in clastic sedimentary rocks.

The process of erosion involves moving weathering products from the weathering site, either as solid material or as dissolved components, to finally be deposited as sediment.

Therefore, sediment is any unconsolidated accumulation of solid, weathered material to become a sedimentary rock that requires High pressure, hence option 3 is correct.

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Which statement best describes how this puddle demonstrates that matter is too small to be seen without magnification?

The light causes a reflection to appear on the surface of the water.
The person cannot see the bottom of the puddle.
The twig floats on top of the puddle of water.
The water cannot be seen when it evaporates.

Answers

Answer:

The twig floats on top of the puddle of water.

Explanation:

The twig will almost seem like magic. Because water is clear its hard to understand matter holding the twig up. But under a microscope you are able to see the qualities of water and the building blocks of matter.

The twig floats on top of the puddle of water  best describes how this puddle demonstrates that matter is too small to be seen without magnification. The correct option is C.

Thus, The inability of the individual to see the puddle's bottom proves that the matter (in this case, the water's constituent particles) is too small to be seen without a magnifying glass.

Because the water droplets are so tiny and tightly packed, light cannot penetrate through the puddle to expose its bottom.

This finding emphasizes how tiny the individual particles are that make up matter.

Thus, The twig floats on top of the puddle of water  best describes how this puddle demonstrates that matter is too small to be seen without magnification. The correct option is C.

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YOU WILL GET 100 POINTS. PLEASE I NEED THIS TO CHECK MY ANSWERS.
ATP stores some of the energy from glucose molecules during glycolysis. How is the remaining energy from these glucose molecules released?(1 point)

Water
Heat
Electron Transport Chain
Carbon Dioxide

Answers

Answer:

Tha answer is Heat.  It is NOT Electron Transport Chain.  100% positive!

Explanation:

The remaining energy from these glucose molecules released as heat.

So, second option is the correct answer.

How is the remaining energy from these glucose molecules released?

During fermentation, most of the energy that was not converted into ATP was trapped in the chemical waste product lactic acid or ethanol, and a small part of the energy was also released as heat.

During cellular respiration, about 41% of the energy in glucose is converted to ATP. Let's see how this value was calculated. From the information above, we know that in an ideal scenario, 1 molecule of glucose produces 38 molecules of ATP. In other words, 1 mole of glucose would produce 38 moles of ATP. Each mole of glucose contains 2870 kJ of energy, and each mole of ATP can release 30.7 kJ of energy. If we produce 38 moles of ATP, it can release a total of 1166.6 kJ of energy (38 moles x 30.7 kJ/mol = 1166.6 kJ). 1166.6 kJ is only about 41% of the total energy of 1 mole of glucose. What happened to the remaining 59% of the energy that was not converted to ATP? During cellular respiration, energy that was not converted to ATP was released as heat.

During fermentation, only about 2% of the energy in glucose is converted into ATP. Let's see how this value was calculated. From the information above, we know that during fermentation, 1 molecule of glucose produces 2 molecules of ATP. In other words, 1 mole of glucose would produce 2 moles of ATP. Each mole of glucose contains 2870 kJ of energy, and each mole of ATP can release 30.7 kJ of energy. If we produce 2 moles of ATP, it can release a total of 61.4 kJ of energy (2 moles x 30.7 kJ/mol = 61.4 kJ). 61.4 kJ is only about 2% of the total energy of 1 mole of glucose.

So,by the above theory,t is clear that the remaining energy from these glucose molecules released as heat.

Heat related one more question:

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Which statement describes a way lava usually affects the shape of a shield volcano?(1 point)

Thick lava flows a long distance before cooling, forming steeply sloping sides.

Thick lava flows a short distance before cooling, forming gently sloping sides.

Thin lava flows a long distance before cooling, forming gently sloping sides.

Thin lava flows a short distance before cooling, forming steeply sloping sides.

Answers

Answer:

Shield volcanoes form very large, gently sloped mounds from effusive eruptions sorry if i got it wrong [tex]\leq[/tex]3

Answer:

Answer: C. Thin lava flows a long distance before cooling, forming gently sloping sides.

Explanation:

let me know if I am wrong.

What factors determine the type of rocks that forms underground?

1.The amount of heat present
2.The amount of water present 2 out of 3 numbers are correct
or 3.The type of minerals that combine

Answers

Answer: the answer is (d)

Explanation:

The initial rocks that form an underground rock that was melted and the history of the molten rocks' cooling are the two main elements that affect the formation of igneous rocks.

What factors affect the rock's formation?

After a rock has been fractured, the fragments of rock and minerals are carried away by a process known as erosion.

The type of igneous rocks that form from magma depends on three factors, the chemical composition of the magma, the temperature at which solidification takes place, and the rate of cooling, which affects the crystallization process.

Therefore, factors determine the type of rocks that forms underground forces of weathering and erosion, and Magma's chemical makeup is subject to change.

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Plants alter their generations by switching between
phases.

Answers

Answer:

This is false. They alter their generations by giving birth to newborn plants. they do not alter their generations by switching between phases.

Explanation:

Describe the path cereal takes from eating with the mouth to glucose in the body cells. (Note: For full credit, your answer must include complete sentences, at least 4 organs of the digestive system, 1 organ of the circulatory system and the process involved for going between the digestive and circulatory.)

Answers

Answer:

The digestive system converts the foods we eat into their simplest forms, like glucose (sugars), amino acids (that make up protein) or fatty acids (that make up fats). The broken-down food is then absorbed into the bloodstream from the small intestine and the nutrients are carried to each cell in the body.

Explanation:

How can a man go eight days without sleep?

Answers

Maybe stay hydrated and make sure u eat also do something that entertains u
pop some energy drinks and let your friend smack you every time you fall asleep

How are crops genetically modified?
PLZ HELP

Answers

Answer:To produce a GM plant, new DNA is transferred into plant cells. Usually, the cells are then grown in tissue culture where they develop into plants. Genetic modification of plants involves adding a specific stretch of DNA into the plant's genome, giving it new or different characteristics.

Explanation:

Answer:

by crossbreeding and controlling

Explanation:

number 1-8 what are they please

Answers

Answer:

Here you go!

Explanation:

1. Cytoplasm

2. Mitochondria

3. Cell wall

4. Cell membrane

5. Golgi apparatus

6. Nucleus

7. Cytoplasm

8.  Vasucole

Correct! Mark them brainiest ^^^

From new moon phase to full moon phase, what do you see?
1. a decreasing amount of the lighted side of the Moon
2. the same amount of the lighted side of the Moon
3. an increasing amount of the lighted side of the Moon
I need an answer ASAP!! I will give you a brainliest!!

Answers

Answer:

I believe the answer is number 3: an increasing amount of the lighted side of the Moon.

Explanation:

When the Moon changes from new Moon to full Moon, the lighted side is shown more and more, increasing from the right side to the left until you can see the whole lighted side. This would mean you would see an increasing amount of the lighted side of the Moon.

How could you describe the size of an atom?

A It is so large it is bigger than a tree in the forest.
B It is so small it cannot be seen without magnification.
C It is the size of a grain of sand and can be seen with our eyes.
D It is the size of an apple or a large piece of fruit.

Answers

B because atoms are very small and cannot be seen with your eyes
Its B

Atoms are extremely small, typically around 100 picometers across.

Superhero DNA

1. What determines a person’s super hero ability?


2. If the DNA sequence were to change, what would this be called?


3. What are proteins and what do they code for?

*just for an assignment*

Answers

Answer:

the proteins are ribosomes

Explanation:

Answer:

1) Strength and agility?

Explanation:

From new moon phase to full moon phase, what do you see?
1. a decreasing amount of the lighted side of the Moon
2. the same amount of the lighted side of the Moon
3. an increasing amount of the lighted side of the Moon
I need an answer ASAP!! I will give you a brainliest!!

Answers

Answer:  I hope its 3

Explanation:

Answer:

C. An increasing amount of the lighted side of the moon.

Explanation:

From a new moon to a full moon, every lunar phase is lighting up. from a full moon to a new moon, every lunar phase, the light is decreasing.

hope this helped. let me know if I am wrong.

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